1.8 Position wing trestles either side such that they will be ready to put under the wings
when needed but not in positions that would interfere with sliding the wings out of the
trailer and into position on the glider.
1.9 While wings are still in the trailer, wipe the main wing fittings clean. Also clean the wing
fittings on the fuselage. Lubricate all spigots and sockets at the wing root and on the
fuselage with a thin coating of grease. Use grease sparingly Figures 3 & 4).
2. Wing Rigging:
2.1 Find four able-bodied individuals to install the wings. Two people will be needed to lift
and manoeuvre each individual wing root and two will be needed to lift and manoeuvre
the wingtip. Whilst manipulating the wing it is imperative to communicate all actions. The
right wing is installed first.
2.2 Slide the right wing from the trailer, roll it level. Manoeuvre the wing into the fuselage.
Gently move the wing vertically as well as fore and aft. Use the wing root/fuselage gap
as a reference to determine fore/aft wingtip movement and line the spigots up with the
sockets. It may also be necessary to lift or lower the front and/or back of the wing at the
root end to line up the spigots/sockets.
KEEP FINGERS AWAY FROM THE GAP IF
YOU WANT TO KEEP THEM!
2.3 Get an observer to stand on the left side of the fuselage and get someone to raise or
lower the wing tip until the end of the spar is more or less vertically central in the
fuselage hole as viewed from the left.
2.4 Rotate the right wing, rear locking sleeve until the slot aligns with the pin and the sleave
springs inboard to encapsulate the pin (Figure 5). Leave the front locking sleave undone
to enable some positioning movement on the right wing should it be required when
aligning with the left wing. Support the right wing with a trestle.
2.5 Slide out the left wing from the trailer, roll it level. Manoeuvre the wing into the fuselage
moving it vertically as well as fore and aft in order to line up the spigots and sockets,
including the spigot on the end of the right wing spar. The spigots at the end of each
spar are the difficult ones. These mate with rose joints in the opposite wing (Figure 6).
Rose joints are spherical and able to swivel. If the spigot is even slightly misaligned,
they will do this and then the spigot will not enter. At this point it may be necessary to
have one or two helpers manoeuvre the right wing tip to help line up spigots and rose
joints/sockets from both sides. Have one person watching the two spigots as the second
wing is mounted, one on the first wing tip, and make sure that both spigots are aligned
both horizontally and vertically (by adjusting the position of both wing tips) before
pushing the second wing home. It helps to have both wings resting on trestles so that
the correct position can be maintained. Success is achieved with a satisfying clunk as
the left wing slides into position.
At this point congratulate yourselves, the hard part
is done!
2.6 Rotate the remaining three locking sleaves until the slots align with the pins and the
sleave springs inboard to encapsulate the pins (Figure 7). Secure and tighten all four
wing-fuselage locknuts by rotating them clockwise on their threads. Get one person on
each wing tip to pull the tips back so that you can further tighten the rear locknuts. Then
get these persons to pull the tips forward so you can further tighten the front locknuts.
Both wings are now securely in place.
Summary of Contents for Acro II
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